The worst customer service. They can just as well have none

The customer serice is absolutely appauling. First they tellme i am logged in in the wrong account. And the more i tell and show them i am logged in correctly the system has a glitch. The less they read and understand. Then after i show them the account they say i amloggex in does not show registeted as i changed from that nunber to this number. Then still they cant allocate my 300 voucher. Which was already paid on 00:32 1st jan.